Boiler



March 6, 1934. Q slMMONs 1,949,939

BOILER Filed NOV. 30, 1931 2 Sheets-Sheet 2 INVENTOR. (Wag/5 A 5mg/701W.

ATTORNEY Patented Mar. 6, 1934 UNITED STATES PATENT FFECE Claims.

My invention relates to a new and useful improvement in a boiler and has for its object the construction oi a water tube boiler arranged in such a manner as to provide a boiler which will 6 be quick in steaming, rapid in circulation, economical to operate and to manufacture and of a simple iorm of construction.

Another object of the invention is the provision of a boiler capable of being used with any type of fuel without impairing the efliciency oi the boiler.

Another object of the invention is the provision of a boiler having an outlet flue projected through the steam dome so that the hot gases passing therethrough may be utilized for heating purposes.

Another object of the invention is the provision of a boiler having a plurality of sinuous water tubes arranged to coopera-te with cailles in such a manner that the hot gases are brought into contact with the tubes perpendicularly to effect an increased heating eiiiciency.

Another object of the invention is the provision or" a boiler having a maximum heating surface and occupying a minimum floor space.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings which form a part of this specification and in which Fig. 1 is a vertical central sectional view of the invention.

Fig. 2 is a fragmentary view taken on line 2 2 of Fig. 1.

Fig. 3 is a. fragmentary View taken on line 3 3 oi Fig-l.

Fig. 4 is a central transverse vertical sectional view of a modified form of the invention.

Fig. 5 is a fragmentary sectional View taken on line 5 5 of Fig. 4.

In the preferred form, the boiler comprises: an outer shell or casing 'l spaced from the inner shell or casing 8 to provide a water leg or compartment 9. A sleeve 10 defines an opening projecting through these casings and is closed at the outer end with a door l1 to provide access to the nre box of the furnace.

As clearly appears in Figs. l, 2 and 3, I provide a plurality of water tubes which are connected at the end 12 in communication with the water leg or compartment 9 and at the end 15 through the top 16 of the inner shell with the Water compartment, these tubes are formed sinuous intermediate their ends and these sinuous formations 13 and 14 extend radially oi the casing or shell 8 and are of such a length that the center of the shell or casing 8 is free from obstructions to provide the central passage 20. It will be noted that the opposite ends of each of the tubes is straight for a considerable distance and this formation is necessary in order that the connections with the water leg may be made and the sinuous formations directed inwardly the proper distance. It will be noted also that these sinuous parts are spaced inwardly at their outer ends from the inner casing 8. The sinuous formation is obtained by doubling the pipe upon itself alternately in opposite directions so as to form the curved part at one side connected to the curved part at the other side, with a straight length of pipe, the sinuous formation of each pipe lying in a common plane. These straight lengths are inclined to the horizontal as are also the upper and lower ends of the pipe so that none of the pipe lies in a horizontal plane. A baiiie plate 30 is supported beneath the top 16 of the inner casing on the straight ends 15 of the water tubing so as to lie directly above the central passage 20 and directly below the conduit 17 which communicates with the outlet flue 18. Thus, the hot gases are baiiled so that their paths of travel will bring them into contact with `the water tubes in paths which are perendicular thereto or substantially so. The outlet flue 18 is positioned above the normal water level 31 and is projected through the steam chest 19 so that the hot gases passing through the outlet flue 18 will be utilized for heating the steam in the steam dome or chest.

With the water tubes formed and mounted in this manner, a maximum area is presented to the hot gases so that an eiiiciency in operation is accomplished and, particularly, insofar as quick steam is concerned. The tubes are so arranged as to be easily accessible for removal and replacement and it is believed that the simplicity of structure which results in the economy of manufacture is evident from the disclosure thus far made.

In the modied form shown in Figs. 4 and 5, the same advantages present in Fig. 1 are obtained and the variations in this structure from the preferred form of structure will appear in I the description of the same. The outer casing or shell 2l is spaced from the inner shell or casing 22 to provide the water leg or compartment 23. The water tube end 24 communicates with the water leg` adjacent the upper end at one side oi the boiler and the other end 26 of this tube communicates with the water leg of the boiler adjacent the bottom at the opposite side of the boiler, this tube being formed sinuous or coiled as at 25 intermediate its ends. The adjacent water tube is connected at the upper end 27 with the side of the boiler opposite to the side to which the adjacent tube connects. The same is true of the lower end 29 of the tube and the coil or sinuous formation 28 is present intermediate the ends of the tubes. This structure lends itself to an elongated or flat boiler construction, Whereas the preferred form is admirably adapted for a boiler of the upright type whether it is square or circular in cross-section.

While I have illustrated and described the preferred form of construction, I do not wish to limit myself to the precise details of structure shown, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A boiler comprising: an outer casing; an inner casing spaced from said outer casing to provide a water compartment; a plurality of tube positioned within said inner casing and communieating at their opposite ends with said water compartment adjacent the lower end thereof and the other end communicating with said water compartment adjacent the upper end thereof, said tubes being formed sinuous intermediate their ends to provide radially projecting coils, the tubes on opposed inner faces being directed inwardly toward each other and terminating in spaced relation to each other to denne a clear central passage in said inner casing; a steam dome positioned above and in communication with said compartment; an outlet flue in said steam dome end extending outwardly from said outer casing above the normal water level; and a conduit communicating the interior of said inner casing with the inner end of said flue at the center of said inner casing.

2. A boiler of the class described comprising: an outer casing; an inner casing positioned within and spaced inwardly of said outer casing to provide a Water compartment; a plurality of water tubes each formed sinuous intermediate its ends, the ends thereof being prolonged as straight bodies and one end communicating with said chamber adjacent the lower end thereof and the other end communicating with said water chamber adjacent the upper end thereof, the upper ends of said tubes being extended diagonally to the vertical axis of said inner casingand sinuous portions of said tubes extending radially of said inner casing, the tubes on opposed inner faces being directed inwardly toward each other and terminating in spaced relation to each other.

3. n a boiler construction of the class described: an outer casing; an inner casing positioned within and spaced inwardly of said outer casing to provide a water compartment; a plurality of water tubes, each formed sinuous intermediate its ends, the ends of each of said tubes communicating with said chamber, one end thereof communicating with said chamber adjacent its bottom, and the other communicating with said chamber adjacent the top, the tubes on opposed inner faces being directed inwardly toward each other and terminating in spaced relation to each other to define a central clear passage in said inner casing, the upper ends or" each said tubes being prolonged as a straight body, said upper ends being inclined outwardly from the center of said inner casing to provide a cage for supporting a baule; and a baie positioned on said cage forming portions of said tubes.

4. In a boiler construction of the class described, an outer casing; an inner casing positioned within and spaced inwardly of said outer casing to provide a water compartment; a plurality of water tubes, each formed sinuous intermediate its ends, the ends of each of said tubes communicating with said chamber, one end thereof communicating with said chamber adjacent its bottom and the other communicating with said chamber adjacent the top, the tubes on opposed inner face being directed inwardly toward each other and terminating in spaced relation to each other, the upper ends of each of said tubes being prolonged as a straight body, said upper ends being inclined upwardly from the center of said casing to provide a supporting cage.

5. In a boiler construction of the class described, an outer casing; an inner casing positioned within and spaced inwardly of said outer casing to provide a water compartment; a plurality of water tubes, each of said tubes being doubled upon itselr` intermediate of its ends a plurality of times to provide a sinuous formation, there being at each doubled-over portion a straight length of tube, inclined to the horizontal, the ends of each of said tubes communicating with said chamber, one end thereof communicating with said chamber adjacent its bottom and the other communicating with said chamber adjacent its top, each of said tubes terminating in a straight portion inclined to the horizontal, the tubes on opposed inner face being directed inwardly towards each other and terminating in spaced relation to each other, said tubes radiating outwardly from all sides of the space dened by the opposed inner faces of said tubes.

CHARLES L. SIMMONS. 

